xfs
[Top] [All Lists]

[PATCH 1/10] VFS: Fix error handling of write_super_lockfs/unlockfs

To: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, "linux-fsdevel@xxxxxxxxxxxxxxx" <linux-fsdevel@xxxxxxxxxxxxxxx>, "dm-devel@xxxxxxxxxx" <dm-devel@xxxxxxxxxx>, "viro@xxxxxxxxxxxxxxxxxx" <viro@xxxxxxxxxxxxxxxxxx>, "linux-ext4@xxxxxxxxxxxxxxx" <linux-ext4@xxxxxxxxxxxxxxx>, "xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>, "axboe@xxxxxxxxx" <axboe@xxxxxxxxx>, "mtk.manpages@xxxxxxxxxxxxxx" <mtk.manpages@xxxxxxxxxxxxxx>
Subject: [PATCH 1/10] VFS: Fix error handling of write_super_lockfs/unlockfs
From: Takashi Sato <t-sato@xxxxxxxxxxxxx>
Date: Fri, 26 Sep 2008 17:57:12 +0900
Cc: "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>
I've changed the type of write_super_lockfs and unlockfs from "void" to
"int" so that they can return an error 
and renamed write_super_lockfs/unlockfs of the super block operation
freeze_fs/unfreeze_fs to avoid a confusion.


Signed-off-by: Takashi Sato <t-sato@xxxxxxxxxxxxx>
Signed-off-by: Masayuki Hamaguchi <m-hamaguchi@xxxxxxxxxxxxx>
---
 Documentation/filesystems/Locking |    8 ++++----
 Documentation/filesystems/vfs.txt |    8 ++++----
 fs/buffer.c                       |    8 ++++----
 include/linux/fs.h                |    4 ++--
 4 files changed, 14 insertions(+), 14 deletions(-)

diff -uprN -X linux-2.6.27-rc7/Documentation/dontdiff 
linux-2.6.27-rc7/Documentation/filesystems/Locking linux-2.6.27-rc
7-lockfs/Documentation/filesystems/Locking
--- linux-2.6.27-rc7/Documentation/filesystems/Locking  2008-09-22 
07:29:55.000000000 +0900
+++ linux-2.6.27-rc7-lockfs/Documentation/filesystems/Locking   2008-09-26 
18:47:47.000000000 +0900
@@ -97,8 +97,8 @@ prototypes:
        void (*put_super) (struct super_block *);
        void (*write_super) (struct super_block *);
        int (*sync_fs)(struct super_block *sb, int wait);
-       void (*write_super_lockfs) (struct super_block *);
-       void (*unlockfs) (struct super_block *);
+       int (*freeze_fs) (struct super_block *);
+       int (*unfreeze_fs) (struct super_block *);
        int (*statfs) (struct dentry *, struct kstatfs *);
        int (*remount_fs) (struct super_block *, int *, char *);
        void (*clear_inode) (struct inode *);
@@ -119,8 +119,8 @@ delete_inode:               no
 put_super:             yes     yes     no
 write_super:           no      yes     read
 sync_fs:               no      no      read
-write_super_lockfs:    ?
-unlockfs:              ?
+freeze_fs:             ?
+unfreeze_fs:           ?
 statfs:                        no      no      no
 remount_fs:            yes     yes     maybe           (see below)
 clear_inode:           no
diff -uprN -X linux-2.6.27-rc7/Documentation/dontdiff 
linux-2.6.27-rc7/Documentation/filesystems/vfs.txt linux-2.6.27-rc
7-lockfs/Documentation/filesystems/vfs.txt
--- linux-2.6.27-rc7/Documentation/filesystems/vfs.txt  2008-09-22 
07:29:55.000000000 +0900
+++ linux-2.6.27-rc7-lockfs/Documentation/filesystems/vfs.txt   2008-09-26 
18:43:49.000000000 +0900
@@ -210,8 +210,8 @@ struct super_operations {
         void (*put_super) (struct super_block *);
         void (*write_super) (struct super_block *);
         int (*sync_fs)(struct super_block *sb, int wait);
-        void (*write_super_lockfs) (struct super_block *);
-        void (*unlockfs) (struct super_block *);
+        int (*freeze_fs) (struct super_block *);
+        int (*unfreeze_fs) (struct super_block *);
         int (*statfs) (struct dentry *, struct kstatfs *);
         int (*remount_fs) (struct super_block *, int *, char *);
         void (*clear_inode) (struct inode *);
@@ -270,11 +270,11 @@ or bottom half).
        a superblock. The second parameter indicates whether the method
        should wait until the write out has been completed. Optional.
 
-  write_super_lockfs: called when VFS is locking a filesystem and
+  freeze_fs: called when VFS is locking a filesystem and
        forcing it into a consistent state.  This method is currently
        used by the Logical Volume Manager (LVM).
 
-  unlockfs: called when VFS is unlocking a filesystem and making it writable
+  unfreeze_fs: called when VFS is unlocking a filesystem and making it writable
        again.
 
   statfs: called when the VFS needs to get filesystem statistics. This
diff -uprN -X linux-2.6.27-rc7/Documentation/dontdiff 
linux-2.6.27-rc7/fs/buffer.c linux-2.6.27-rc7-lockfs/fs/buffer.c
--- linux-2.6.27-rc7/fs/buffer.c        2008-09-22 07:29:55.000000000 +0900
+++ linux-2.6.27-rc7-lockfs/fs/buffer.c 2008-09-26 18:41:12.000000000 +0900
@@ -214,8 +214,8 @@ struct super_block *freeze_bdev(struct b
 
                sync_blockdev(sb->s_bdev);
 
-               if (sb->s_op->write_super_lockfs)
-                       sb->s_op->write_super_lockfs(sb);
+               if (sb->s_op->freeze_fs)
+                       sb->s_op->freeze_fs(sb);
        }
 
        sync_blockdev(bdev);
@@ -235,8 +235,8 @@ void thaw_bdev(struct block_device *bdev
        if (sb) {
                BUG_ON(sb->s_bdev != bdev);
 
-               if (sb->s_op->unlockfs)
-                       sb->s_op->unlockfs(sb);
+               if (sb->s_op->unfreeze_fs)
+                       sb->s_op->unfreeze_fs(sb);
                sb->s_frozen = SB_UNFROZEN;
                smp_wmb();
                wake_up(&sb->s_wait_unfrozen);
diff -uprN -X linux-2.6.27-rc7/Documentation/dontdiff 
linux-2.6.27-rc7/include/linux/fs.h linux-2.6.27-rc7-lockfs/includ
e/linux/fs.h
--- linux-2.6.27-rc7/include/linux/fs.h 2008-09-22 07:29:55.000000000 +0900
+++ linux-2.6.27-rc7-lockfs/include/linux/fs.h  2008-09-26 18:44:27.000000000 
+0900
@@ -1314,8 +1314,8 @@ struct super_operations {
        void (*put_super) (struct super_block *);
        void (*write_super) (struct super_block *);
        int (*sync_fs)(struct super_block *sb, int wait);
-       void (*write_super_lockfs) (struct super_block *);
-       void (*unlockfs) (struct super_block *);
+       int (*freeze_fs) (struct super_block *);
+       int (*unfreeze_fs) (struct super_block *);
        int (*statfs) (struct dentry *, struct kstatfs *);
        int (*remount_fs) (struct super_block *, int *, char *);
        void (*clear_inode) (struct inode *);

<Prev in Thread] Current Thread [Next in Thread>